Population - Demographics - ImmigrationDeclining fertility rates dictate a closer look at immigration policy. |
The world's fertility rate is decreasing. In 1960 it was 5.0 in 2012 it was 2.5. That might at first glance look like cutting it in half. If though we consider the replacement rate of about 2.1 to be our base line and our goal, then since 1960 we have cut 2.5 from the fertility rate and have 0.4 to go. The fertility rate is the average number of children each woman has, the replacement rate is one that maintains a stable population from generation to generation. The Google Public Data Explorer is an excellent tool for visualizing and comparing population changes in nations, regions and the world. You can choose which nations and regions to compare. Other world development indicators can be examined. It should be noted that decreases in population lag declines in the fertility rate. Population continues to grow for awhile after the fertility rate has dropped below the replacement rate. Replacement rates vary some from nation to nation, based on differences in such variables as infant mortality, health care, and longevity. |
The dictionary.com definition of demographics is: "the statistical data of a population, especially those showing average age, income, education, etc."
"Due to demographic changes, the U.S. Social Security system will face financial challenges in the near future. Declining fertility rates and increasing life expectancies are causing the U.S. population to age. Today 12 percent of the total population is aged 65 or older, but by 2080, it will be 23 percent. At the same time, the working-age population is shrinking from 60 percent today to a projected 54 percent in 2080. Consequently, the Social Security system is experiencing a declining worker-to-beneficiary ratio, which will fall from 3.3 in 2005 to 2.1 in 2040 (the year in which the Social Security trust fund is projected to be exhausted). This presents a significant challenge to policymakers."
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